REL-1229 -B Reliability Report for AME5142 Series Product Approved by Prepared by Amy Shen Quality & Reliability Dept. Manager Eric Chen Quality & Reliability Dept. Engineer Conclusion: The AME5142 series product has successfully met AME’s reliability standard that is required on all AME, Inc products. Furthermore, QRA Dept. of AME, Inc monitors the reliability continuously to make sure that all AME8500 series product will still meet AME’s reliability standard in the future. Table of Contents: Ⅰ、General Description Ⅱ、Product Information Ⅲ、Failures In Time Calculation Ⅳ、Product Reliability Test Result Ⅴ、Package Reliability Test Result Ⅵ、IR-reflow Test Result Ⅰ、General Description: The AME5142 is a Boost DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive one to six LEDs in series from a Lilon cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AME5142 switches at 1.2MHz, allowing the use of tiny external components. The input and output capacitor can be as small as 1µF(or 4.7µF), saving space and cost versus alternative solutions. A low 0.15V feedback voltage minimizes power loss in the current setting resistor for better efficiency. The AME5142 is available in SOT-26/TSOT-26 & SOT-25/TSOT-25 packages. Ⅱ、Product Information: Pin Operating Ambient Package Number of Configuration Temperature Range Type Pins E:-40℃ to 85℃ E:SOT-2X V: 5 ADJ: Adjustable Y: Lead free & Y: 6 Low profile A (SOT-25) (TSOT-25) A (SOT-26) (TSOT-26) 1. SW 2. GND 3. FB 4. EN 5. IN 1. SW 2. GND 3. FB 4. EN 5. OVP 6. IN Output Voltage Special Feature Z: Lead Free Ⅲ、Failures In Time Calculation: Use HTOL test information mentioned in sectionⅣ, FIT (Failures In Time) can be calculated as below: FIT = ( x 2 (ν , CL ) × 10 9 ) /( 2 × S × H × AF ) = ( 4 .61 × 10 9 ) /( 2 × 77 × 1000 × 280 .59 ) =106.69 (pieces per 109 hours) @ 40℃ with 90% Confidence Level. Where AF is acceleration factor setting activation energy to 1.0eV as zero failure. Ⅳ、Product Reliability Test Result: Test Item HTOL Test Condition Precondition NOTE 1 Sample Size / Failures Result 77 pcs / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass TSTRESS=125℃ Duration=1000hrs Biased, Read at 168/504/1000 hours ESD Human Body Model Pin-to-Pin test Level 2, 2kV minimum Charged Device Model Level 2, 200V minimum Latch-up Level 3, 100mA minimum NOTE 1: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 245℃ (leaded) or 260℃ (lead-free). Ⅴ、Package Reliability Test Result: Test Item MSL HTS THT PCT TCT TST Solderability Test Condition 85/85 168 hours IR-reflow 3 cycles Peak Temp.= 260℃ (lead-free) IPC/JEDEC J-STD-020C Precondition NOTE 2 Temp.=150℃ Duration=1000 hours Unbiased, Read at 1000 hours Precondition NOTE 2 Temp.=85℃, R.H.=85% Duration=1000 hours Unbiased, Read at 1000 hours Precondition NOTE 2 Temp.=121℃, R.H.=100% 15PSIG, Unbiased Duration=168 hours Read at 168 hours Precondition NOTE 2 -65℃ ~ 150℃ 500 cycles Unbiased, Read at 500 cycles Precondition NOTE 2 -55℃ ~ 125℃ 200 cycles Unbiased, Dwell time:5min Read at 200 cycles Temp.=245℃ (leaded) Temp.=260℃ (lead-free) Duration=5sec Sample Size / Failures Result 22 pcs / 0 pcs Level 1 45 pcs / 0 pcs Pass 45 pcs / 0 pcs Pass 45 pcs / 0 pcs Pass 45 pcs / 0 pcs Pass 45 pcs / 0 pcs Pass 5 pcs / 0 pcs Pass NOTE 2: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 245℃ (leaded) or 260℃ (lead-free). Ⅵ、IR-reflow Test Result: Test Item Test Condition Sample Size / Failures Result IR-reflow See IR reflow Profile 22 pcs / 0 pcs Pass Perform 3 cycles test IR reflow Profile: Profile Feature Average Ramp-Up Rate (Tsmax to Tp) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (tsmin to tsmax) Time maintained above - Temperature (TL) - Time (tL) Peak/Classification Temperature (Tp) Time within 5℃ of actual Peak Temperature (tp) Ramp-Down Rate Time 25℃ to Peak Temperature Sn-Pb Eutectic Assembly Pb-Free Assembly 3℃/second max. 3℃/second max. 100℃ 150℃ 60~120 seconds 150℃ 200℃ 60~180 seconds 183℃ 60~150 seconds 245℃ 217℃ 60~150 seconds 260℃ 10~30 seconds 20~40 seconds 6℃/second max. 6 minutes max. 6℃/second max. 8 minutes max.